Platen roller for typewriters



April 17, 1928. 1,666,403

M. H. ALEXANIAN PLATEN ROLLER FOP: TYPEWRITERS Filed July 22 1926 mmmm yn X\\\ INVENTOR BYdM ATTORNEY I Patented Apr. 17, 1928.

UNITED STATES MIERAN H. ALEXANIAN, F COYTESVILLE, NEW JERSEY.

PLATEN ROLLER FOR TYPEWRITEBS.

Application filed duly 22, 1926. Serial No. 124,301.

The invention relates to an improved article of manufacture in platenrollers for typewriters and the method of making the same.

The object of the invention is to provide an article that is-superior inquality, ,elasticity and durability to the so-called rubber-sulphurcompound that forms the ingredients of all such platens now in use andon the market for like purposes.

My composition consists of a mixture of aper pulp, cardboard, or othervegetable fibrous material, such as cellulose, cotton fabric, or canvas,as a back ground and an adhesive substance, when moist, readilyoxidizable in, and hardening on, exposure to air; and preventing whendry the per meation of moisture, combined with soft,

velvety vegetable compounds, such as wood .pulp, powdered charcoal, corkand the like pulverized to the required degree of fineness, as the casemay be, for forming the bulk or body portion and for the surface orfinishing thereof. Referring to the drawings:

Figure l is a perspective view embodying the principles of my invention.

Figure 2 is a broken detailed sectional view.

My inventionconsists of the formation of a platen 1 made up ofconcentric layers of cork layers 4 and 5 on a paper pulp cylinder 2,sald layers 2, 4 and 5, being cemented together by shellac 3 or othersuitable cement or binder. The layer 5 is finely divided or ground corkwhich may be dyed to give a better. appearance. This finely divided corkis smoothed down to furnish a velvet like surface to the touch. Thedetailed description of the manufacture is as follows:

In the preparation and construction of my article of manufacture I use ahollow metal roller'turned down to the desired size and adapted to beheated by steam for drying purposes, about which I plaster in uniformlayers a mixture of paper pulp, which has been freed from moisture asmuch as possible by passing re eatedly between rollers or wringers for tat purpose and subsequently mixed with enough fluid shellac,

according to bulk, to give it a pasty, sticky adhesivenms, so that it iscapable of plastic manipulation to the desired shape, thickness and sizeon such roller. After I have placed a uniform layer of such mixture onthe roller to form a base or back ground of the pre ferred thickness anddried, another layer or coat of fluid shellac is applied or painted onthis mixture of paper pulp, as described, and dried to a semi-solidcondition, when coarse ground or pulverized cork is applied evenlythereto and rolled down to a smooth even surface, and thoroughly driedand hardened. After this layer has become hard and resistant, anotherlayer or coat of fluid shellac is applied or painted thereon, and al- 05lowed to dry to a semi-solid condition, when finely divided cork, dyedto any desired color, is applied thereon, rolled down evenly all overthe surface and thoroughy dried and hardened for use.

While the foregoing description details the most usual method in thepreparation and construction of my im roved article of manufacturesubstitutes or the various ingredients may be adopted with equally goodsubstantial results, such as vegetable cotton fibre for the pa er pulp,or this substitute may be supplie in the .form'of cloth, or cottonfabric, or canvas, while as a substitute for shellac, raw linseed oil towhich has been added enough turpentine to make a rapidly oxidizable anddrying mixture may be applied in the same order in the same manner andwith the like effect as heretofore described.

My composition for an article of manufacture herein described is lightin weight, durable, elastic, adhesive and permanent, adheres withoutcracking or checkin when thoroughly dried or hardened, wit stands longusage without change or variation in form or contour, permanentlyretains its smooth, velvety surface and to the very highest de reepossesses all the desired properties of a platen roller for the purposesmentioned 3 and can be made of the desired thickness by the addition ofadditional concentric layers of the coarser ground cork cementedtogether by shellac.

What I claim is:

1. A platen roller havin a velvety surface of finely divided cor saidsurface formed on a. more coarsely ground layer of being ap lied in thefirst layers over the cork, and means for cementing the two layers paperp p followed by a like application of together. the-finer powder andmeans for cementing 10 2. A platen roller having a velvety surthe pulpand cork into an integral unit. -face platen for typxewriters consistingof In wltness whereof Ihave hereunto setmy aper pul and cor pulverizedto various hand in the execution hereof. egrees o fineness the coarsergrain cor MIHRAN H. ALEXANIAN.

